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  1. AndrewEngEET

    Why are PSV spools cut on an angle?

    Awesome! Thanks for the in-depth answers! I also appreciate the link to the previous posts. I will make sure I do a more thought search next time. Andrew
  2. AndrewEngEET

    Why are PSV spools cut on an angle?

    I was working at a refinery awhile back and had a quesiton that no one could answer. I was looking up at some of the PSV's on the towers that wer not vented to the flare. All of these atmospheric relief safety valvs had a small spool that came out of the horizontal exit and then made a 90...
  3. AndrewEngEET

    DC motor control

    Thanks for the advice. I investigated some of the BK Precision models, and they seem to be perfrct for this application. Much chaper then I thought. (Around the same as the Leeson DC-DC controller) Andrew
  4. AndrewEngEET

    DC motor control

    I am trying to simulate the motor running on a vehicle, so the PWM is not really the answer. This system will be open loop. You are right about this being a "life test" rig. We are testing for extended periods (weeks) with the motor cycling on a relay. And you are also right about the...
  5. AndrewEngEET

    DC motor control

    I'm not specifially looking for a digital unit. I just need any type of DC controller that will limit the voltage seen at the motor input terminals to a certain value. It does not matter if I have to use a multi-meter to help set up the value, because it will only change every few months. I just...
  6. AndrewEngEET

    DC motor control

    I am in a research and development environment. I, as the junior engineer, have been charged with running a small 12v DC electric vacuum pump project. I need to be able to control the speed (and voltage) of the motor, no matter what the load. The motor draws 15A normally, and can draw a...

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